某难选金红石矿选矿试验研究

某金红石矿品位较低,嵌布粒度细,属难选微细粒金红石矿。本文采用浮选抛尾作为金红石选别的预选作业,可一次性抛尾72.27%;抛尾后的粗精矿再采用重选、再磨酸浸、浮选的工艺流程,获得了含TiO290.28%、回收率为47.37%的金红石精矿。     

湖北枣阳细粒原生金红石矿浮选分离研究

湖北枣阳金红石矿含Ti O23.06%,主要有用矿物为金红石,脉石矿物为角闪石、钙铁榴石,矿石嵌布关系复杂,为细粒难选矿石。针对该难选矿石,进行了浮选试验研究,捕收剂采用C5⁹羟肟酸+苄基砷酸(BAA)组合用药,浮选闭路试验表明采用二者组合用药,可获得金红石粗精矿Ti O2品位43.30%、回收率67.98%,基本实现金红石的有效分离,试验指标良好。     

陕西某微细粒难选金红石矿选矿试验研究

陕西某金红石矿嵌布粒度细微, 被绿泥石等脉石矿物紧密包裹, 分选难度大。采用浮选为主, 浮选-重选联合抛尾, 粗精矿再磨, 酸洗、浮选的工艺流程, 可获得TiO₂品位为90.31%, 回收率为47.36%的金红石精矿。浮选抛尾72.27%, 重选抛尾21.74%, 浮选-重选联合共抛尾94.01%, 只有6%左右的粗精矿进入精选。该工艺的特点是: 粗选大量抛尾、粗精矿再磨再选即“阶段磨矿阶段选别”, 可以降低选矿成本, 减少工艺的复杂性。     

枣阳原生金红石矿选冶新工艺

针对枣阳原生金红石矿特点,用磁选—重选—浮选相结合的联合工艺流程进行分选,磁选可抛除20%左右的磁性矿物,非磁性产品经螺旋溜槽进行脱泥后进入浮选作业,用苯乙烯膦酸和正辛醇作组合捕收剂,经一次粗选、两次精选和两次扫选可得TiO_2品位为70.98%,作业回收率为88.60%的浮选精矿。浮选精矿经磁选焙烧酸洗后,最终精矿TiO_2品位为89.53%,回收率为74.78%。     

某金红石矿区富矿体特征及其矿选矿试验研究

在研究刘岗金红石矿区地质特征,金红石富矿体赋存特征,金红石的赋存状态、嵌布特征及粒度变化特征的基础上,采用新的选矿工艺对金红石矿进行了选矿试验。区内金红石富矿体赋存在左老庄组一段上部,含矿岩石主要是黑云角闪片岩和黑云斜长角闪片岩。金红石多呈半自形柱状、短柱状、粒状嵌布在角闪石、斜长石等脉石矿物之间。采用磨矿擦洗—重选—磁选—重选—微生物选矿工艺流程,获得最终精矿指标为:品位(RTiO2)91.07%,回收率(RTiO2)70.55%。微生物提纯金红石新方法的深入研究可作为开发利用南召—泌阳金红石矿带金红石矿的突破口。     

湖北某地金红石选矿新工艺试验研究

根据湖北某地粗粒嵌布的金红石矿的性质特点,在工艺矿物学和详细条件试验研究的基础上,制定了一种新的选矿工艺流程(磁选-脱泥-浮选),先对矿石磁选抛尾,脱泥后进行浮选,再对浮选精矿进行除杂处理,最终获得高品质的金红石精矿,其品位在90%以上,回收率70%以上,显示出该工艺流程的合理性及先进性,对同类矿石具有一定的参考价值。     

新山金红石的矿物工艺特性与选矿工艺初探

经过对四川会东新山金红石矿的矿物工艺特性研究,得知该矿金红石品位较高(3.0%～4.5%),嵌布粒度细,镶嵌关系复杂.根据矿物的工艺性质,提出了采用磁电选联合选矿工艺.探索试验指标为金红石精矿1品位90.16%,回收率34.35%;精矿2品位81.07%,回收率9.27%;精矿3品位63.57%,回收率4.34%.     

新山金红石的矿物工艺特性与选矿工艺初探

经过对四川会东新山金红石矿的矿物工艺特性研究,得知该矿金红石品位较高（3.0%-4.5%）,嵌布粒度细,镶嵌关系复杂,根据矿物的工艺性质,提出了采用磁电选联合选矿工艺,探索试验指标为金红石精矿1品位90.16%,回收率34.35%;精矿2品位81.07%,回收率9.27%;精矿3品位63.57%,回收率4.34%。     

山西某金红石矿选矿试验研究

山西某金红石矿采用重选主干流程进行选别,精矿产品TiO2品位为90%左右,但金红石(TiO2)的回收率不足50%。为提高金红石的选矿回收率,开展了以浮选为主干流程的选矿工艺研究。确定的选矿方案为两次浮选抛尾─金红石浮选(一次粗选、两次精选)─浮选精矿除杂(弱磁选—强磁选—重选)。全流程试验结果表明:采用浮选主干流程大大提高了精矿TiO2的回收率,总精矿TiO2回收率为69.25%,金红石矿物的回收率达到86.42%,其中精矿1含TiO289.58%、TiO2回收率46.84%;精矿2含TiO280.53%、TiO2回收率22.41%。同时综合回收了磁铁矿和钛铁矿。     

原生金红石矿浮选药剂研究进展

我国原生金红石矿具有矿物成分复杂、目的矿物品位低、嵌布粒度较细等特点, 浮选法是回收利用金红石和提高其品位的重要手段, 其中浮选药剂是关键。浮选金红石的捕收剂主要有脂肪酸类、膦酸类、胂酸类、羟肟酸类, 调整剂可分为活化剂与抑制剂。为促进金红石选矿技术的进步, 以及为选矿工作者们提供技术理论的参考, 文章在概述了金红石矿性质、浮选难点以及微纳气泡浮选的基础上, 对捕收剂、抑制剂、活化剂的研究进展与作用机理进行了详细的阐述, 以加深对原生金红石矿浮选药剂的认识与了解, 并对未来药剂的研究方向进行了展望。      

Current situation and future trend of China rare earth luminescent material industry

<正>Rare earth luminescent material is one of the most important application sectors of rare earths.China enjoys the exceptional advantage to develop rare earth luminescent material for its abundant rare earth resources.After several decades'endeavor,China's rare earth luminescent material industry,headed by rare earth phosphor for lamp and LED and high efficient rare earth energy-saving light source,has been gradually developed into a scale industry.China has become a major production base of rare earth phosphor for lamps and rare earth     

China rare earth market review

正June 1~10,2014Rare earth market remained weak.Quoted price of rare earth products was similar to that in May.There was no sign of recovery in downstream market.The market of NdFeB magnetic materials and phosphor was depressed.Catalyst,polishing powder and ceramic industries remained inactive.Demand from downstream industry was soft.Consumers purchased on their needs.Suppliers had strong intention to sell.Prices of rare earth products     

Annual Report analysis of Chinese rare earth-related listed companies in 2013

<正>Chinese rare earth-related listed companies have published their 2013 annual reports.It can be understood from their reports that production and operation activities of Chinese rare earth-related companies were still heavily affected by macro economy and industrial policies.They basically followed the steps of national economy.In 2013,world economy recovered slowly but the economy     

Market opportunities and challenges for rare earth polishing powder

正1.Status of rare earth polishing powder Rare earth polishing powder with high content of cerium oxide began to replace iron oxide for glass polishing and became one of the key materials in glass polishing process since 1940.Compared with traditional iron oxide,rare earth polishing powder has many advantages,such as fast polishing rate,high polishing quality and long service life.It can achieve good surface quality and improve operation conditions.For example,in lens polishing,the polishing work that cerium     

Baotou Research Institute of Rare Earths developed a new RE alloy preparation technology

正Pyrometallurgy Laboratory of Baotou Research Institute of Rare Earths had independently developed a new preparation technology of rare earth alloy for NdFeB.The alloy can remarkably enhance the coercivity of NdFeB magnet but also evidently reduce the production cost of the magnet.The new master alloy was prepared in the kA pilot-scale electrolytic cell by the independent technology.The rare earth master alloy can be used as the raw material for NdFeB.Compared     

矿用防爆轴流对旋主要通风机叶片ANSYS模态分析及应用

高效节能矿用防爆对旋主要通风机的叶片是主要通风机运行的关键部件,叶片在运行时不断受到气流的作用力,从而使叶片产生振动,当叶片振动的频率与叶片的固有频率接近时,容易产生共振从而导致叶片的断裂。一旦叶片断裂时,对主要通风机的安全运行产生致命的影响,从而导致矿山、化工等企业发生重大事故,将会产生不可估量的损失。基于有限元分析软件ANSYS,对高效节能矿用防爆轴流对旋主要通风机叶片进行模态分析及产生对应的六阶模态频率,对主要通风机叶片的运行频率、固有频率及产生的共振问题进行了原理分析,并且解决了叶片频率共振的问题,从而为主要通风机叶片结构设计提供理论依据,并对主要通风机叶片的安全运行提供保障。     

2013 NdFeB export analysis

<正>China totally exported nearly 24,000 tonsof NdFeB products during 201 3,including 18,825 tons of permanent magnet,valued USD 1.34 billion at an average price of 71.4 USD/kg;3,277 tons of NdFeB magnetic powder,valued USD 1 01 million at an average price of 30.9 USD/kg;1,334 tons of strip casting ribbon,with total export value of USD 74million at an average price of 55.3 USD/kg;and 586     

Market and recycling of NiMH battery

<正>Market status and future trend of NiMH battery1.Global market of small NiMH battery Global market size of small NiMH batteries declined year on year since 2011.The trend will continue to 2018,at the rate of 5%to 10%annually.Demand for small NiMH batteries will be stable gradually.Many electrical apparatuses are powered by the built-in lithium battery today,which is the main reason for the shrunk market of small NiMH batteries.But,for some products,small NiMH     

China rare earth market review

正September 1-10,2014 Affected by the National Day holiday,rare earth transaction was stagnant and the market showed a weak steady state.As there was no good news for downstream market,some products with flat demand would likely rally slightly for some time to     

唐口煤矿深部复杂开采工作面瓦斯分源涌出规律研究

研究工作面瓦斯涌出规律对工作面瓦斯治理有重要意义。为了得到唐口煤矿深部3号煤层复杂开采条件下工作面回采时期瓦斯涌出时空演化规律,选取6304工作面作为对象,采用实测方法研究6304工作面瓦斯涌出规律。结果表明:6304工作面瓦斯涌出量为6.534 m³/min,其中煤壁占34.27%,落煤占29.62%,采空区占36.11%;沿工作面倾向由低到高,瓦斯浓度整体为上升趋势,其中1—76号架工作面瓦斯浓度小于0.20%,76—102号架瓦斯浓度上升明显,最大为0.387%;上隅角的后部采空区是工作面的瓦斯主要涌出源,上隅角1号测点瓦斯浓度0.78%,上隅角周边3号、5号、7号、8号、9号测点瓦斯浓度平均为0.643%;周期来压时,上隅角瓦斯相对平时较高。研究为针对性的瓦斯分源监控与灾害防治提供基础。